Things have come a long way since TS2009 in many areas including AI operations. A lot of the AI issues you do run into, are your own doings. If you think and plan carefully, the AI will do as they are told and not what you think you told them. With that said, however, things aren't perfect and they do some unusual, well probably known only to the AI minds, things that will never cease to amaze you. With the program's new multi-threaded technology, the AI works better because there is less contention as there was in the old Jet-engine based game code.
Hopefully you have upgraded your computer since that state of the art system from a decade ago. TRS19 is also quite an advanced and requires a more substantial computer system than the one you have in your signature. The program is fully 64-bit and will as much resources as it can handle in a typical 64-bit application fashion. The more RAM you have the better. The program, unlike previous versions, is more GPU-driven, and less reliant on the CPU for operations so having a substantial video card, such as a GTX1070 or higher, will do well for you, but you also need a CPU too that will be able to handle the GPU data as well without becoming the bottleneck.